UCD3138: Questions about the inline void handle_idle_state(void) function in UCD3138 full-bridge hard-switch evaluation board firmware

zoujiangyilang

Part Number: UCD3138

Hello
I was recently learning the UCD3138 Full Bridge Hard Switch Evaluation Board firmware
I have a problem with inline void handle_idle_state(void)
I found variables such as cc_flag, restart_counter, cc_counter, return_value in the function, I do not know what these variables mean?

Thank you

over 7 years ago

0 Yitzhak Bolurian over 7 years ago

TI__Mastermind 18370 points

CC stands for Constant Current which is a protection feature.
Above certain current we regulate current instead of regulating voltage, for example to protect against short circuit.
These parametrs are only set to their initial value in the idle state, so they will be initialized ahead of time and used in regualted state.
CC-Flag indicates that you are in constant current mode. cc_counter > 50000 is used in order to only shut down (by setting fault_type = OVER_CURRENT) after 5s IF cc_shutdown is not disabled. restart_counter is used for setting the delay between hiccups.

Regards,

0 zoujiangyilang over 7 years ago in reply to Yitzhak Bolurian

Genius 4560 points

Got it!Thank you very much!

0 zoujiangyilang over 7 years ago in reply to Yitzhak Bolurian

Genius 4560 points

What does "return_value" mean? I missed this variable.

0 zoujiangyilang over 7 years ago in reply to zoujiangyilang

Genius 4560 points

What does "return_value" 、''PSON''、''ON_OFF_TOGGLED''mean? I missed these variables.

0 zoujiangyilang over 7 years ago in reply to Yitzhak Bolurian

Genius 4560 points

If I set restart_counter to 10000, does this correspond to 1s?
How does this correspondence relate to conversion and what information do I have to refer to?

0 Yitzhak Bolurian over 7 years ago in reply to zoujiangyilang

TI__Mastermind 18370 points

PSON is defined as:

#define PSON (MiscAnalogRegs.GLBIOREAD.all & MASK_CTRL_PIN)

Meaning the status of CTRL pin in the GLBIO pins. This is the pin that turns the output of power supply on and off.

ON_OFF_TOGGLED is the varible/flag that is used to get out of latched fault. The power supply stays in latched fault mode till PSON goes low and the power supply is reinitialized and go to idle mode reday to be turned on again.

Which reurn_value are you referring to? There are several.

return_value is usually a variabled return by a function when is exits that function.

Regards,

0 Yitzhak Bolurian over 7 years ago in reply to zoujiangyilang

TI__Mastermind 18370 points

Indeed.
10000*100 uS = 1S

0 zoujiangyilang over 7 years ago in reply to Yitzhak Bolurian

Genius 4560 points

Got it！Thank you！
Regards，
zoujiangyilang

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UCD3138: Questions about the inline void handle_idle_state(void) function in UCD3138 full-bridge hard-switch evaluation board firmware